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NLO matching for t ̄tbb ̄ production with massive b-quarks


Cascioli, Fabio; Maierhoefer, Philipp; Moretti, Niccolo; Pozzorini, Stefano; Siegert, Frank (2014). NLO matching for t ̄tbb ̄ production with massive b-quarks. Physics Letters B, 734:210-214.

Abstract

Theoretical uncertainties in the simulation of ttbarbbbar production represent one of the main obstacles that still hamper the observation of Higgs-boson production in association with top-quark pairs in the H→bbbar channel. In this Letter we present a next-to-leading order (NLO) simulation of ttbarbbbar production with massive b-quarks matched to the SHERPA parton shower. This allows one to extend NLO predictions to arbitrary ttbarbbbar kinematics, including the case where one or both b-jets arise from collinear g→bbbar splittings. We find that this splitting mechanism plays an important role for the ttbarH(bbbar) analysis.

Abstract

Theoretical uncertainties in the simulation of ttbarbbbar production represent one of the main obstacles that still hamper the observation of Higgs-boson production in association with top-quark pairs in the H→bbbar channel. In this Letter we present a next-to-leading order (NLO) simulation of ttbarbbbar production with massive b-quarks matched to the SHERPA parton shower. This allows one to extend NLO predictions to arbitrary ttbarbbbar kinematics, including the case where one or both b-jets arise from collinear g→bbbar splittings. We find that this splitting mechanism plays an important role for the ttbarH(bbbar) analysis.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Physics Institute
Dewey Decimal Classification:530 Physics
Language:English
Date:2014
Deposited On:20 Feb 2015 21:50
Last Modified:07 Sep 2017 08:14
Publisher:Elsevier
ISSN:0370-2693
Free access at:Publisher DOI. An embargo period may apply.
Publisher DOI:https://doi.org/10.1016/j.physletb.2014.05.040

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